Improvement in magnetic grain-separators



Patented April 8, 1879.

H. E. COOK & J. B. THAYER. Magnetic Grain Separator.

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WITNESS .S w-(L M a )ff @ma fle UNITED STATES PATENT OEEICE.

HENRY E. .COOK AND JESSE B. THAYER, OF RIVER FALLS, WISCONSIN.

lIMPROVEMENT IN MAGNETIC GRAINfSEPARATORS.

Specification forming part 'of Letters Patent No. 914,025, dated April B, 1879; application filed February 20, 1879. j

.'Zo all 'whom 'it may concern Be it known that we, HENRY E. 000K and JESSE B. THAYER, of River Falls, county of Pierce, and State of Wisconsin, have invented a new and useful Machine for the Purpose of Removing-Magnetic Bodies from Grain or other Finely-Subdividcd Materials, ofwhich the `followin g is aV specification: I

Our invention relates mainly to the removal of particles of iron, steel, and other magnetic `substances from grain and other materials by the'use of magnetscombined with a movable conveyer, 'arranged under a hopper in such a manner as to cause the grain or other material to flow over and around the magnets, to facilitate the attraction of the magnets upon such particles of iron, steel, and other magnetic material.

Our invention also relates to a speedy and convenient method of removing such particles of iron and steel from such magnets, and to a j convenient method of changing the positions of the magnets for., the purpose of removing the particles adhering thereto by rotating the conveyers to which they are attached.

In the accompanying drawings,'which illustrate a good form of our invention, Figure 1 is a side elevation of our apparatus, partly in section, on the -line 1 1 of Fig. 2. Fig. 2 is a vertical section through the line 2 2 of Fig. 1.

Fig. 3 is an end View, showing one disk of the conveyer and connected mechanism; and Fig. 4 is an opposite end view, showing the other disk and connected mechanism.

A indicates the frame-work of the machine',

arranged to support the working parts. B

and B' are disks or plates, between which is aV triangular box, C, of `which c c cv are the sides, the said disks forming, with the sides c, when in position, conduits or chutes for the passage of the grain that is fed from the hopper D. Within this box C, and projecting at each of its three corners, so as to be inthe path of the descending-grain, are the magnets E,which may be either permanent or induced magnets.

Where induced magnets are employed, the magnetwires F are attached on one side of the apparatus respectively to one of the three pins with the metallic band of a small wheel, K, secured on the disk B, and thus connect with one pole of the battery by means of a metallic spring, L, which presses upon this metallic band continuously, and is attached'to the battery-wire`pin g.' On the outside of the other disk, B', the pins H are connected with the springs M, adjusted alternately to bear upon a segmental connector, N, to which is attached the other pole of the battery or electric machine through the battery-wire pin g'.

0 O O are adjustable slides to control .the flow ofthe grain. P P P are side. pieces to prevent the grain from falling backward in the rear of the machine. Q is a receptacle for the particles of iron. R is-a stationary brush -to assist in removing the particles of iron and steel adhering to the magnets; and S S are pins or deliectors placed above the magnets, equidistaut from them, to direct the grain {1pon them.

The operation of our machine is as follows: The material is introduced through the hopper, falls upon one of the shelves or chutes c, and passes over and around the magnets, the particles of iron being retained by them, and the grain passing off by a suitable conveyer, as at X. At suitable intervals th disks B B' are rotated one-third of a revolution by an attendanitjE-fcr clock-work may be employed to effect this automatically. The conveyer may be stopped in the proper position by a tlreenotched ratchet and spring-pawl, as at T t. By this partial rotation one of the springs M passes oi the connector N, thus breaking the circuit yfor one set of magnets, which demagnetizes that set and causes the particles of iron to fall into the receptacle Q. Any particles retained by residual magnetism, or where' permanent magnets are used, are removed by for another set of magnets, so that the operation of separating the metal from the grain 'may continue.

It is obvious that by mere formal modiiication, without eparting from the substance of .my invention, the rotating conveyer may be made with four or even morel sides instead of three; and of course suchaconstrnction would 3. The combination of a rotary eonvjeyer reduire a corresponding modification of the having magnets projecting there'om and sul` po e-changing mechanism. `instable slides to control the dow of the grain, `Hoving thus described our invention,` what substantially as described.`

We clpim, and desire to secure by Lettere Pab- 4. The combination of a rotary etmveym l ent, 1s having magnets projeetiug thereom and side i y In e magnetic separator, a rotary con` pieues, P to prevent the 'grain from falling i i veyer formed with plane conveying-surfaces, backward in the rear of the machine, Bubstw i and having magnets projecting into the path tially as described. i of the grain.

HENRY E. 000K. "t 2. The combination of a, rotary eonveyer, JESSE B. THAYER. -j magnets projecting therefrom4 and pins or Witnesses: i guides to deiiect the flow of tbe grain upon ALLEN P. WELD, y themagnets, substantially as described. EDWARD BELL. 

